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A compartment interchangeably holds either a battery or a fuel cartridge for powering a portable electronic device. The compartment includes electrical contacts to access energy stored in a battery. The compartment further includes a fuel port to access fuel stored in a fuel cartridge. Either of the

A compartment interchangeably holds either a battery or a fuel cartridge for powering a portable electronic device. The compartment includes electrical contacts to access energy stored in a battery. The compartment further includes a fuel port to access fuel stored in a fuel cartridge. Either of the battery or the fuel cartridge may be installed in the compartment. A portable electronic device, which is powered interchangeably by either a battery or a fuel cell, includes the compartment. A method of powering the portable electronic device includes installing either a battery or a fuel cartridge into a compartment that interchangeably holds the battery and the fuel cartridge, and powering the device using energy stored in the respectively installed battery or energy stored in fuel contained in the respectively installed fuel cartridge.

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1. A dual-purpose compartment of a portable electronic device that interchangeably holds either a battery or a fuel cartridge, the compartment comprising:means for electrically contacting the battery when the battery is installed in the compartment; andmeans for extracting fuel from the fuel cartrid

1. A dual-purpose compartment of a portable electronic device that interchangeably holds either a battery or a fuel cartridge, the compartment comprising:means for electrically contacting the battery when the battery is installed in the compartment; andmeans for extracting fuel from the fuel cartridge when the fuel cartridge is installed in the compartment,wherein the portable device is powered by energy stored in either the battery or the fuel of the fuel cartridge while the battery or the fuel cartridge is interchangeably installed in the compartment.2. The compartment of claim 1, wherein the portable device is one of a digital camera, video camera, a laptop computer, a personal digital assistant (PDA), a pocket computer, a compact disk (CD) player, an MP3 player, a portable radio, portable electronic toys, and a cellular telephone.3. The compartment of claim 1, wherein the electrical contacting means and the fuel extracting means are each located in different portions of the compartment, the electrical contacting means comprising an electrical contact and the fuel extracting means comprising a fuel port.4. The compartment of claim 1, wherein the electrical contacting means and the fuel extracting means are co-located within the compartment.5. The compartment of claim 4, wherein the electrical contacting means comprises a plurality of electrical contacts, and wherein the fuel extracting means comprises a fuel port, the fuel port being adjacent to an electrical contact of the plurality.6. The compartment of claim 5, wherein the electrical contact that is adjacent to the fuel port comprises an electrically conductive portion that has a fuel port aperture, wherein the fuel port is accessible via the fuel port aperture.7. The compartment of claim 6, wherein the fuel port aperture is either a slot in an edge of the conductive portion or a hole extending through opposite surfaces of the conductive portion.8. The compartment of claim 6, wherein the conductive portion comprises a band of a resilient material formed in a semi-circular or convex shape, the shape and the resilience of the band enabling the conductive portion to act as a spring.9. The compartment of claim 6, wherein the conductive portion comprises a wire of a resilient material formed into a coiled spring, the fuel port aperture being at an open end of the coiled spring.10. The compartment of claim 5, wherein the fuel port extends through a wall of the compartment and comprises:a gasket having an opening therethrough, the opening leading to a fuel channel of the portable device; anda pin attached to the gasket and suspended in the opening, the pin extending out from the gasket toward the adjacent electrical contact,wherein when the fuel cartridge is installed, a nozzle of the fuel cartridge makes contact with the gasket to form a seal and the pin extends into the nozzle to activate a pressure-activated valve within the nozzle, such that the activated valve allows fuel to flow from the fuel cartridge through the gasket opening and into the fuel channel.11. The compartment of claim 5, wherein the fuel port extends through a wall of the compartment to interface with a fuel channel of the portable device, the fuel port comprising:a hollow needle having a blunt tip and an aperture adjacent to the blunt tip,wherein when the fuel cartridge is installed in the compartment, the hollow needle penetrates a gasket-like valve of the fuel cartridge, such that the aperture of the hollow needle allows fuel to flow from the fuel cartridge through the hollow needle and into the fuel channel of the portable device.12. The compartment of claim 5, wherein the fuel port extends through a wall of the compartment to interface with a fuel channel of the portable device, the fuel port comprising:a hollow needle having a sharp tip and an aperture adjacent to the sharp tip; anda gasket at a base of the hollow needle, the base being opposite to the sharp tip,wherein when the fuel cartridge is installed in the compartment, a wall of the fuel cartridge makes contact with the gasket to form a seal and the sharp tip of the hollow needle pierces a membrane seal of the fuel cartridge, such that the aperture of the hollow needle allows fuel to flow from the fuel cartridge through the needle and into the fuel channel of the portable device.13. The compartment of claim 4, wherein the electrical contacting means comprises a plurality of electrical contacts, and wherein the fuel extracting means comprises a fuel port, the fuel port being combined with an electrical contact of the plurality.14. The compartment of claim 13, wherein the combined fuel port and electrical contact comprise:an electrically conductive plate mounted on a spring, the plate having a fuel port aperture; anda fuel port portion, wherein the fuel port aperture connects to the fuel port portion.15. The compartment of claim 14, wherein the fuel port portion comprises a tube that extends through a wall of the compartment, the tube connecting the fuel port portion to a fuel channel of the portable device.16. A portable electronic device comprising:a dual-purpose compartment, the compartment interchangeably accepting either a fuel cartridge for a fuel cell or a battery to power the device.17. The device of claim 16, further comprising:a fuel cell;a power supply; anddevice electronics,wherein the power supply provides operational power to the device electronics interchangeably using energy stored in either the battery when installed in the dual-purpose compartment or fuel contained in the fuel cartridge when separately installed in the compartment, the energy stored in the fuel being extracted and supplied to the power supply by the fuel cell.18. The device of claim 16, further comprising:a fuel cell;a fuel cell-based power supply;a battery-based power supply; anddevice electronics,wherein the device electronics receive operational power from the fuel cell-based power supply when a fuel cartridge is installed in the dual-purpose compartment, the fuel cell-based power supply receiving energy extracted by the fuel cell from fuel contained in the fuel cartridge, andwherein the device electronics receive operational power from the battery-based power supply when a battery is installed in the dual-purpose compartment, the battery-based power supply receiving energy from the battery.19. A method of powering a portable electronic device comprising:installing either a battery or a fuel cartridge in a dual-purpose compartment of the device, the compartment interchangeably holding either the battery or the fuel cartridge; andpowering the device using energy stored in the respectively installed battery or in fuel contained in the respectively installed fuel cartridge.20. A dual-purpose compartment of a portable electronic device, the compartment comprising:a plurality of electrical contacts that contacts a battery when the battery is installed in the compartment; anda fuel port that extracts fuel from a fuel cartridge for use in a fuel cell of the portable electronic device when the fuel cartridge is installed in the compartment,wherein the compartment interchangeably holds either the battery or the fuel cartridge, the portable device being powered either by energy stored in the battery or by energy produced from the extracted fuel by the fuel cell while the respective battery or fuel cartridge is interchangeably installed in the compartment.21. The compartment of claim 20, wherein an electrical contact of the plurality and the fuel port are either adjacent to one another or combined with one another.22. The compartment of claim 20, wherein the fuel port is combined with an electrical contact of the plurality, the combined fuel port and electrical contact comprising:an electrically conductive plate mounted on a spring, the plate having a fuel port aperture; anda fuel port portion, wherein the fuel port aperture connects to the fuel port portion.23. The compartment of claim 20, wherein the fuel port is adjacent to an electrical contact of the plurality, the adjacent fuel port and electrical contact comprising an electrically conductive portion that has a fuel port aperture, wherein the fuel port is accessible via the fuel port aperture.24. The compartment of claim 23, wherein the fuel port aperture is either a slot in an edge of the conductive portion or a hole extending through opposite surfaces of the conductive portion.